Valve construction for automatic shut-off screwdrivers and the l

Details Valve construction for automatic shut-off screwdrivers and the l Valve construction for automatic shut-off screwdrivers and the l

1991-09-27

1992-11-03

Yost, Frank T.

Tool driving or impacting

Automatic control of power operated means

Drive means responsive to torque or speed condition

173178, 81470, B25B 23145

Patent

active

051599872

ABSTRACT:
A valve construction for dual valve automatic and manual shut-off screwdrivers and the like wherein construction of the valve features both valve elements in a central axial bore having a unique valve block which is held in place by a screw in a transverse bore, the unique construction permits operation of the manual valve by a pin in the cross bore, aligns the stem of the manual valve, and permits ready access to the stem and valve of the automatic shut-off device as well as assembly of all of the components through access in a single longitudinal bore.

REFERENCES:
patent: 3195704 (1965-07-01), Linsker
patent: 3477521 (1969-11-01), Kiester et al.
patent: 3821991 (1974-07-01), Alexander
patent: 3970151 (1976-07-01), Workman, Jr.
patent: 4492146 (1985-01-01), Workman, Jr.
patent: 4535850 (1985-08-01), Alexander
patent: 4813492 (1989-03-01), Biek

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